. Electric railway journal . Momentum Brake—Details of Single-Truck Equipment This device differs from other momentum brakes in notdepending upon anything outside the regular brake shoesfor stopping the car. The momentum principle is appliedsimply to cause the revolution of a drum, which, in turn,actuates the ordinary brake rigging as if hand, electric orair power had been applied from the platform. The entiremechanism is so simple and compact that its weight forthe double-truck car under test does not exceed 80 lb. The ELECTRIC RAILWAY JOURNAL. 844 ELECTRIC RAILWAY JOURNAL. [Vol. XXXIII. No.
. Electric railway journal . Momentum Brake—Details of Single-Truck Equipment This device differs from other momentum brakes in notdepending upon anything outside the regular brake shoesfor stopping the car. The momentum principle is appliedsimply to cause the revolution of a drum, which, in turn,actuates the ordinary brake rigging as if hand, electric orair power had been applied from the platform. The entiremechanism is so simple and compact that its weight forthe double-truck car under test does not exceed 80 lb. The ELECTRIC RAILWAY JOURNAL. 844 ELECTRIC RAILWAY JOURNAL. [Vol. XXXIII. No. 18. car which carries this equipment weighs about 15 tons,empty, and has longitudinal seats for 40 passengers. It isbeing operated on several routes under different crews, sothat its effectiveness can be determined under all the di-verse conditions prevailing in a crowded hill city. In fact, Special Pull-roato regular drake Pull-redconriectec/ tobrake s^aff. Momentum Brake—Plan of Equipment for Double-Truck Car many of the stops must be made near sharp curves at thebase of long grades. The operation of this brake can be made clear from theaccompanying drawings and description of a completebraking movement. Since no great leverage is requiredon the platforms, the motormans brake handle is no largerthan that used with an air brake. This handle, on beingmoved a couple of inches, turns a i-in. staff. The latter
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